Create-Venv.ps1

<#!
.SYNOPSIS
Creates a virtual environment for a CI machine.

.DESCRIPTION
If the virtual environment directory already exists, it will skip the creation. The location of the virtual environment will be stored in a variable
named <VenvName>_LOCATION. The location will be RepoRoot + VenvName.

.PARAMETER VenvName
The name of the virtual environment which will be created.

.PARAMETER RepoRoot
The root of the repository.
#>
param(
    [string] $VenvName = "venv"
)

$repoRoot = Join-Path $PSScriptRoot ".." ".." -Resolve
$venvPath = Join-Path $repoRoot $VenvName

if (!(Test-Path $venvPath)) {
    if (Get-Command uv -ErrorAction SilentlyContinue) {
        Write-Host "Creating virtual environment '$VenvName' using uv."
        uv venv $venvPath  --verbose
    }
    else {
        $invokingPython = (Get-Command "python").Source

        Write-Host "Creating virtual environment '$VenvName' using virtualenv and python located at '$invokingPython'."
        python -m pip install virtualenv==20.25.1
        python -m virtualenv $venvPath
    }
    $pythonVersion = python --version
    Write-Host "Virtual environment '$VenvName' created at directory path '$venvPath' utilizing python version $pythonVersion."
    Write-Host "##vso[task.setvariable variable=$($VenvName)_LOCATION]$venvPath"
}
else {
    Write-Host "Virtual environment '$VenvName' already exists. Skipping creation."
}